class student:
    def __init__(self, name, grade):
        self.name = name
        self.grade = grade

    def instroduce(self):
        print("hi i'm " + self.name)
        print("my grade is " + str(self.grade))

    def improve(self, amount):
        self.grade = self.grade + amount

jim = student("jim",98)
jim.improve(10)
jim.instroduce()




